In order to better carry out neutron chopper design

simulation of neutron pulse speciality formed by single disc and Double-Disc respectively. According to the single-cut and double-cut the structural model and corresponding physical parameters

Simulation is done by the internationally popular Mcstas simulation software. We got the influence curve of physics parameters for chop disk

discuss the differences

advantages and disadvantages of the neutron pulse generated by the single disk and double-disk. For opposite ratate direction Double-Disc chopper

the second cut-width of the window should be less than 34 mm in a specific physical parameters. The results can be as the referrence and theoretical support for the chopper's optimize design and manufacture.